DS18B20 Waterproof Temperature Probe - 1m Cable, Stainless Steel

Name: DS18B20 Waterproof Temperature Probe - 1m Cable, Stainless Steel
Brand: Generic
SKU: SENS-3844
Price: 50.00 INR
Availability: OutOfStock

₹50.00 (Inclusive of all taxes)

Out of Stock

This DS18B20 waterproof temperature probe integrates the digital sensor chip within a 6mm stainless steel housing, providing reliable temperature measurement from -55°C to +125°C. It is compatible with 3.0-5.5V systems and communicates via a 1-Wire interface, making it suitable for Arduino, Raspberry Pi, ESP32, and other microcontrollers.

Features

High-accuracy digital temperature sensor with ±0.5°C precision.
IP68-equivalent waterproof stainless steel probe (6mm x 50mm) for harsh environments.
1-Wire digital interface requires only a single microcontroller pin.
Wide operating range from -55°C to +125°C.
Includes 1-meter shielded cable for stable, long-distance signal transmission.

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Description

The DS18B20 waterproof probe utilizes a factory-calibrated digital temperature sensor chip sealed within a corrosion-resistant stainless steel tube. This construction provides an IP68-equivalent barrier against moisture and contaminants, making it ideal for submersion or use in wet conditions. The internal sealing glue and pin-level heat-shrink tubing ensure electrical isolation and long-term reliability.

Communication is handled via the 1-Wire protocol, which allows multiple sensors to be daisy-chained on a single digital pin, simplifying system design. The sensor outputs temperature data with user-selectable resolution from 9 to 12 bits and features a programmable alarm function for high/low temperature limits. A 4.7kΩ pull-up resistor between the DATA line and VCC is required for proper microcontroller interfacing.

Key Features

Digital 1-Wire interface minimizes wiring complexity and enables multi-drop sensor networks.
Stainless steel probe housing (6mm diameter, 50mm length) provides robust physical and environmental protection.
Factory-programmed 64-bit serial number enables unique identification of each sensor on a shared bus.
Wide supply voltage range from 3.0V to 5.5V ensures compatibility with 3.3V and 5V logic systems.
User-configurable measurement resolution from 9 to 12 bits for a balance of speed and precision.
Integrated programmable temperature alarm system for threshold monitoring.
Shielded 1-meter cable maintains signal integrity over extended runs.

Applications

Liquid temperature monitoring in aquariums, hydroponics, and brewing systems.
Environmental sensing in weather stations and soil temperature profiling.
HVAC system duct, refrigerant line, and boiler temperature measurement.
Industrial process monitoring in wet or corrosive environments.
DIY projects and prototyping with Arduino, Raspberry Pi, and ESP-based systems.

Technical Specifications

Sensor Model	DS18B20
Measurement Range	-55°C to +125°C
Accuracy	±0.5°C
Resolution	User-selectable, 9 to 12 bit
Interface	1-Wire Digital
Supply Voltage	3.0 VDC to 5.5 VDC
Probe Material	Stainless Steel
Probe Dimensions	6mm Diameter, 50mm Length
Cable Length	1 Meter (Shielded)
Cable Color Code	Red: VCC, Yellow/White: DATA, Black: GND
Query Time	750 ms (max, for 12-bit resolution)
Operating Temperature	-55°C to +125°C

Frequently Asked Questions

What is the wiring connection for this DS18B20 probe?

The probe uses a standard three-wire connection: Red wire to VCC (3.0-5.5V), Yellow or White wire to the microcontroller's digital DATA pin, and Black wire to GND. A 4.7kΩ pull-up resistor must be connected between the DATA line and VCC for reliable 1-Wire communication.

Is this sensor truly waterproof?

Yes. The DS18B20 chip is hermetically sealed with internal glue within a stainless steel tube, and each pin is insulated with heat-shrink tubing. This construction provides an IP68-equivalent waterproof and moisture-proof barrier, making it suitable for submersion and use in wet environments.

How do I connect multiple DS18B20 sensors to one microcontroller pin?

The 1-Wire protocol supports multi-drop networks. Connect all sensor VCC pins to power, all GND pins to ground, and all DATA pins together to a single microcontroller digital pin. Ensure a single 4.7kΩ pull-up resistor is connected from the shared DATA line to VCC. Each sensor's unique 64-bit ROM address allows individual communication.

What is the required pull-up resistor value and where does it connect?

A 4.7kΩ resistor is required. Connect one end to the DATA line (Yellow/White wire) and the other end to the VCC line (Red wire). This resistor acts as a pull-up for the open-drain 1-Wire bus and is essential for proper signal communication between the sensor and the host microcontroller.